Ionia Weather Forecast

    • 57
    • 77

    Rain Showers Likely

    • 54
    • 74

    Partly Sunny

    • 59
    • 78

    Mostly Sunny

    • 60
    • 81

    Rain Showers Likely

    • 56
    • 75

    Chance Thunderstorms

    • 56
    • 72

    Slight Chance Rain Showers

Today 19 Aug Ontario

Partly sunny with a chance of Showers this Morning, then Showers likely with a chance of Thunderstorms this afternoon. Highs Ranging from the mid 70s on the Hilltops to the upper 70s across the lower Elevations. Light Winds, becoming west around 10 Mph. Chance of rain 70 percent.

Tonight 19 Aug Ontario

Mostly cloudy with a chance of Showers in the Evening, then partly cloudy overnight. Lows in the upper 50s. Light west Winds. Chance of rain 40 percent.

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Ionia Temperature Statistics

August Temperature

Rochester, Greater Rochester International Airport (15.5 miles)

  • Lowest 4 August, 2026

    57.7 °F

  • Average August

    73.2 °F

  • Highest 5 August, 2026

    87.7 °F

Climate (2021–2026)

Rochester, Greater Rochester International Airport (15.5 miles)

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  • Average Low 2021–2026

    42.3 °F

  • Average 2021–2026

    50.8 °F

  • Average High 2021–2026

    59.6 °F
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